30906961 has 6 divisors (see below), whose sum is σ = 31161986. Its totient is φ = 30654000.

The previous prime is 30906947. The next prime is 30906979. The reversal of 30906961 is 16960903.

It can be written as a sum of positive squares in only one way, i.e., 21022225 + 9884736 = 4585^2 + 3144^2 .

It is not a de Polignac number, because 30906961 - 2⁵ = 30906929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30906991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16261 + ... + 18061.

Almost surely, 2^30906961 is an apocalyptic number.

It is an amenable number.

30906961 is a deficient number, since it is larger than the sum of its proper divisors (255025).

30906961 is an equidigital number, since it uses as much as digits as its factorization.

30906961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 30906961 is about 5559.4029355678. The cubic root of 30906961 is about 313.8234805117.

The spelling of 30906961 in words is "thirty million, nine hundred six thousand, nine hundred sixty-one".